Parts of western Europe are experiencing some of their worst pollution for several years.
In Paris air quality has been close to the highest alert level.
For only the fourth time in 20 years, the French capital has been restricting traffic via odd and even number plates.
Lyon is following suit for the first time from Friday – just as hundreds of thousands of visitors are expected in the French city for the annual Lights Festival.
But the amount of dangerous particles rising each day, households and industry have been asked to reduce emissions. As in Paris, public transport is to be made free.
France extends car restrictions in Paris and expands them to Lyon in fight against air pollution
France extends car restrictions in Paris and expands them to Lyon in fight against air pollution pic.twitter.com/EFID7ByUDD
— CCTVNEWS (@cctvnews) 9 декабря 2016 г.
Airparif, the air quality observatory in Ile-de-France, foresees a further exceeding of the alert threshold (80 micrograms per cubic meter of air) of the concentrations of fine particles.
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In Lyon and Villeurbanne, where the critical threshold of 80 μg / m3 is likely to be exceeded in the coming days.